package com.gpl.rpg.atcontentstudio.model.maps;

import java.awt.Image;
import java.awt.Point;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import javax.swing.tree.TreeNode;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import com.gpl.rpg.atcontentstudio.model.GameSource;
import com.gpl.rpg.atcontentstudio.model.GameSource.Type;
import com.gpl.rpg.atcontentstudio.model.Project;
import com.gpl.rpg.atcontentstudio.model.ProjectTreeNode;
import com.gpl.rpg.atcontentstudio.model.gamedata.GameDataSet;
import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;

public class Worldmap extends ArrayList<WorldmapSegment> implements ProjectTreeNode {

	private static final long serialVersionUID = 4590409256594556179L;

	public static final String DEFAULT_REL_PATH_IN_SOURCE = "res/xml/worldmap.xml";
	public static final String DEFAULT_REL_PATH_IN_PROJECT = "maps"+File.separator+"worldmap.xml";
	
	public File worldmapFile;
	public GameSource parent;
	
	public Map<String, Map<String, Point>> segments = new LinkedHashMap<String, Map<String,Point>>();

	public Worldmap(GameSource gameSource) {
		this.parent = gameSource;
		if (getDataType() == Type.source) {
			worldmapFile = new File(parent.baseFolder, DEFAULT_REL_PATH_IN_SOURCE);
		} else {
			worldmapFile = new File(parent.baseFolder, DEFAULT_REL_PATH_IN_PROJECT);
		}
		if (worldmapFile.exists()) {
			loadFromFile(worldmapFile);
		}
		if (getDataType() == Type.source) {
			for (WorldmapSegment segment : this) {
				segment.writable = false;
			}
		} else {
			for (WorldmapSegment segment : this) {
				segment.writable = true;
			}
		}
	}

	private void loadFromFile(File file) {
		if (!file.exists()) return;
		 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
	        Document doc;
	        try {
	            factory.setIgnoringComments(true);
	            factory.setIgnoringElementContentWhitespace(true);
	            factory.setExpandEntityReferences(false);
	            DocumentBuilder builder = factory.newDocumentBuilder();
	            InputSource insrc = new InputSource(new FileInputStream(file));
	            insrc.setSystemId("http://worldmap/");
	            insrc.setEncoding("UTF-8");
	            doc = builder.parse(insrc);
	            
	            Element root = (Element) doc.getElementsByTagName("worldmap").item(0);
	            if (root != null) {
	            	NodeList segmentsList = root.getElementsByTagName("segment");
	            	if (segmentsList != null) {
	            		for (int i = 0; i < segmentsList.getLength(); i++) {
	            			Element segmentNode = (Element) segmentsList.item(i);
	            			String name = segmentNode.getAttribute("id");
	            			add(new WorldmapSegment(this, name, segmentNode));
	            		}
	            	}
	            }
	        } catch (SAXException e) {
	            e.printStackTrace();
	        } catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (ParserConfigurationException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
	}

	@Override
	public Enumeration<WorldmapSegment> children() {
		return Collections.enumeration(this);
	}

	@Override
	public boolean getAllowsChildren() {
		return true;
	}

	@Override
	public TreeNode getChildAt(int arg0) {
		return get(arg0);
	}

	@Override
	public int getChildCount() {
		return size();
	}

	@Override
	public int getIndex(TreeNode arg0) {
		return indexOf(arg0);
	}

	@Override
	public TreeNode getParent() {
		return parent;
	}

	@Override
	public boolean isLeaf() {
		return false;
	}

	@Override
	public void childrenAdded(List<ProjectTreeNode> path) {
		path.add(0,this);
		parent.childrenAdded(path);
	}

	@Override
	public void childrenChanged(List<ProjectTreeNode> path) {
		path.add(0,this);
		parent.childrenChanged(path);
	}

	@Override
	public void childrenRemoved(List<ProjectTreeNode> path) {
		if (path.size() == 1 && this.getChildCount() == 1) {
			childrenRemoved(new ArrayList<ProjectTreeNode>());
		} else {
			path.add(0, this);
			parent.childrenRemoved(path);
		}
	}

	@Override
	public String getDesc() {
		return (needsSaving() ? "*" : "")+"Worldmap";
	}
	@Override
	public void notifyCreated() {
		childrenAdded(new ArrayList<ProjectTreeNode>());
	}
	
	@Override
	public Project getProject() {
		return parent.getProject();
	}

	@Override
	public Image getIcon() {
		return DefaultIcons.getMapClosedIcon();
	}
	@Override
	public Image getLeafIcon() {
		return null;
	}
	@Override
	public Image getClosedIcon() {
		return DefaultIcons.getMapClosedIcon();
	}
	@Override
	public Image getOpenIcon() {
		return DefaultIcons.getMapOpenIcon();
	}

	@Override
	public GameDataSet getDataSet() {
		return null;
	}

	@Override
	public Type getDataType() {
		return parent.getDataType();
	}

	public void save() {
		
		try {
			Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
			doc.setXmlVersion("1.0");
			Element root = doc.createElement("worldmap");
			doc.appendChild(root);

			for (WorldmapSegment segment : this) {
				root.appendChild(segment.toXmlElement(doc));
			}

			saveDocToFile(doc, worldmapFile);
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public WorldmapSegment getWorldmapSegment(String id) {
		for (WorldmapSegment s : this) {
			if (s.id.equals(id)) {
				return s;
			}
		}
		return null;
	}

	public void addSegment(WorldmapSegment node) {
		ProjectTreeNode higherEmptyParent = this;
		while (higherEmptyParent != null) {
			if (higherEmptyParent.getParent() != null && ((ProjectTreeNode)higherEmptyParent.getParent()).isEmpty()) higherEmptyParent = (ProjectTreeNode)higherEmptyParent.getParent();
			else break;
		}
		if (higherEmptyParent == this && !this.isEmpty()) higherEmptyParent = null;
		add(node);
		node.parent = this;
		if (higherEmptyParent != null) higherEmptyParent.notifyCreated();
		else node.notifyCreated();
	}

	
	public static void saveDocToFile(Document doc, File f) {
		try {
			Transformer transformer = TransformerFactory.newInstance().newTransformer();
			Result output = new StreamResult(new FileOutputStream(f));
			Source input = new DOMSource(doc);
			transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
			transformer.setOutputProperty(OutputKeys.INDENT, "yes");
			transformer.setOutputProperty("{http://xml.apache.org/xalan}indent-amount", "2");
			transformer.transform(input, output);
		} catch (TransformerConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (TransformerFactoryConfigurationError e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (TransformerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	@Override
	public boolean needsSaving() {
		for (ProjectTreeNode node : this) {
			if (node.needsSaving()) return true;
		}
		return false;
	}
	
}